Matches 1 - 50 out of 98 1 2 >
Match Document Document Title
7563030 Method of making fluid dynamic bearing  
A method of making a fluid dynamic bearing ( 10 ) includes the flowing steps. At least two bearing parts ( 10 a, 10 b ) are firstly provided. Each of the bearing parts has its shape corresponding...
7507039 Dynamic pressure bearing manufacturing method, dynamic pressure bearing and dynamic pressure bearing manufacturing device  
A dynamic pressure bearing manufacturing method, comprising the steps of forming a herringbone groove pattern on the outer peripheral surface of a cylindrical mask and a spiral groove pattern on...
7494283 Hydrodynamic bearing assembly  
A hydrodynamic bearing assembly ( 10 ) includes a bearing sleeve ( 11 ) defining a receiving chamber ( 113 ) therein, a bearing ( 12 ) received in the receiving chamber of the bearing sleeve, a...
7411762 Fluid dynamic pressure bearing including dynamic pressure generating grooves, and spindle motor and disc drive including the bearing  
In a fluid dynamic pressure bearing, upper herringbone grooves and lower herringbone grooves continuous with the upper herringbone grooves are formed on the inner peripheral surface of a sleeve by...
7229214 Fluid dynamic bearing unit  
A fluid dynamic bearing unit includes a bearing housing ( 20 ) axially defining therein a bearing hole ( 21 ), a rotary shaft rotatably received in the bearing hole with a radial space formed...
7165889 Bearing oil lift pocket  
An oil lift pocket for a bearing surface having a plurality of channels in communication with a supply port. The plurality of channels may be formed in a substantially bow shaped configuration....
7140777 Hydrodynamic bearing assembly  
A hydrodynamic bearing assembly comprises a bearing ( 10 ) defining a bearing hole ( 12 ) therein, a shaft ( 20 ) rotatably received in the bearing hole with a bearing clearance formed between a...
7125170 Fluid dynamic bearing motor  
Provided is a fluid dynamic bearing motor in which a rotor is rotatably supported by forming an oil gap between the rotor and a stator to form a fluid dynamic pressure bearing and a plurality of...
6979923 Motor having dynamic pressure fluid bearing and disc drive apparatus provided with the motor  
A motor ( 100 ) having a dynamic pressure fluid bearing is composed of a hub ( 2 ), a rotor ( 4 ) provided with a shaft ( 7 ) of which one end portion is securely fastened by the hub ( 2 ) and...
6955472 Lubricant reservoir for gas bearing  
A method and apparatus is provided for allowing a molecularly thin film to be established on a surface of the gas fluid dynamic bearing. The film can be controllably replenished so that the problem...
RE38791 Sliding bearing  
A helically continuous projection 1 a is formed around a sliding surface 1 A of a sliding bearing 1 at a given pitch p . The surface roughness h of the sliding surface 1 A, including the...
6851861 Lubricant retention design for disk drive fluid dynamic bearing spindle motor  
A lubricant retention design for a fluid dynamic bearing design in a spindle motor utilizes a labyrinth gap that is formed between the sleeve and the shaft of the bearing. The gap is used in...
6776529 Antiwear lubrication coating for bearing surfaces for hydrodynamic fluid bearings  
A very thin lubricant coating is applied to one or both of the facing surfaces defining the gap of a hydrodynamic bearing to prevent wear of these surfaces. The lubricant film is necessarily very...
6765326 Cooling device motor having a hydrodynamic bearing with a unitary shaft thrust supporter  
A motor and a cooling device include (a) a frame with an opening, (b) a frame-housing provided on the frame and having one open side, (c) a stator mounted on an outer wall of the frame-housing, (d)...
6702464 Dynamic pressure bearing with improved starting characteristics  
A hydrodynamic bearing assembly with improved activation features is provided. The opposing surfaces in the radial and thrust bearings have grooves 2 and 5 with depths shallower gradually...
6428211 Hydrodynamic gas bearing structure  
A hydrodynamic gas bearing structure includes a columnar shaft body ( 1 ) and a hollow cylindrical bearing body ( 2 ) arranged opposing the shaft body ( 1 ) with a space ( 3 ) maintained in the...
6400052 Motor and rotary apparatus having motor  
A motor has a support member, a bearing member mounted in a hollow space of the support member for undergoing rotation, a rotor member having a shaft portion disposed in a hollow space of the...
6378209 Method of producing fluid bearing device  
In a dynamic pressure bearing device which has a shaft ( 3 ), a bearing ( 10 ) rotatable relative to the shaft ( 3 ), and capillary seal portions ( 13, 14 ) for holding a lubricating fluid ( 15 )...
6371650 Hydraulic dynamic bearing and spindle motor and rotary assembly provided  
A double sleeve type dynamic bearing comprises a fixed shaft having at least one end fixedly mountable to an apparatus in which the bearing is utilized, a rotary sleeve arranged coaxially with the...
6361214 Hydrodynamic-pressure bearing device and motor provided with the hydrodynamic-pressure bearing device  
Spindle motor hydrodynamic pressure bearing device having upper and lower radial bearing portions axially separated by an air space, established in the micro-gap between the outer circumferential...
6341896 Hydrodynamic bearing and method of manufacturing the same  
A shaft member 21 the flexible, austenitic stainless steel is cold worked, and in the cold working process, a cold working ratio is increased, whereby a surface of the shaft member 21 is...
6338574 Bearing mechanism, hard disk drive mechanism and polygon mirror drive mechanism using the bearing mechanism, and method for manufacturing herringbone groove portions of dynamic-pressure bearing  
A bearing mechanism eliminates the need for lubricating oil, is capable of generating enough radial dynamic pressure even in lower-speed regions, and yet can be easily surface-machined for the...
6280089 Rotational shaft for a non-ball type bearing  
A shaft structure for rotational support by a non-ball type bearing includes a spherical rotation-supporting section and a non-spherical section. The spherical rotation-supporting section provides...
6276831 Rotary apparatus with asymmetrically formed dynamic pressure generating grooves  
A rotary apparatus includes: a radial fixed member; a rotary unit rotatably supported on the radial fixed member; a radial dynamic pressure bearing portion at which the radial fixed member faces...
6256885 Hydrodynamic gas bearing and manufacturing method thereof  
A hydrodynamic gas bearing structure which can effectively prevent the half speed whirl phenomenon and prevent wear at the time of activation or stopping of rotation is implemented in a simple...
6088557 Electrostatographic printing apparatus with endless recording belt  
Electrostatographic printing apparatus with a recording member in the form of an endless belt (26), and an air bearing (50) for guiding such belt along an endless path, which air bearing includes...
6082900 Dynamic pressure pneumatic bearing structure and method of manufacturing the same  
Provided is a hydrodynamic gas bearing structure which can prevent occurrence of whirl not only in high-speed rotation but also in low-speed rotation, reduces such frequency that a floating...
6076456 Flywheel quill with thrust plates and axial rotor guiding  
A flywheel quill with thrust plate and axial rotor guiding. Bronze thrust plates are attached to the hub of a flywheel and hydrostatic pads secured to the frame of a press are adjoining the bronze...
6034454 Motor  
A motor having a shaft body, a generally disk-like thrust plate extending outwardly in a radial direction from an outer periphery surface of the shaft body, a cylindrical sleeve structure which...
6010246 Hydrodynamic bearing apparatus and method of manufacturing it  
A hydrodynamic bearing apparatus comprises a shaft and a bearing having facing hydrodynamic surfaces therebetween. Hydrodynamic pressure generating grooves are disposed on at least one of the...
5997180 Circumferential flow type dynamic pressure bearing  
A circumferential flow type dynamic pressure bearing 1 is comprised of a shaft 2 having a multiple-arc-shaped pressure generating surface and a circular sleeve 3 fitted on the shaft 2. The shaft or...
5944427 Dynamic pressure gas bearing structure and method of manufacturing the same as well as method of using the same  
A cross-sectional shape of a shaft body 1 perpendicular to its axis O has a shape defined by a closed curve having a plurality of maximal points M 1 , M 2 and M 3 whose distances from the axis...
5924798 Hydrodynamic bearing apparatus and method for manufacturing thereof  
A hydrodynamic bearing apparatus and a method for manufacturing a hydrodynamic bearing apparatus consists of providing a shaft and rotatably fitting the shaft to a bearing. Hydrodynamic pressure...
5909966 Self-acting air bearing  
A self-acting air bearing includes a housing, a shaft member supported in the housing, a cylindrical member which is installed around the shaft member coaxially and rotatably, and which rotates and...
5909339 Method and apparatus for cleaning air in a hard disk drive  
The present invention relates to a method and apparatus for cleaning air in a hard disk drive by gathering the air in the upper and lower portion of the disk and discharging it outwardly through...
5906440 Dynamic pressure type fluid bearing device  
A dynamic pressure type fluid bearing device includes a rotary shaft, a hollow sleeve in which the rotary shaft is rotatably mounted, and at least two sets of dynamic pressure generating grooves...
5822846 Method of manufacturing a disk drive spindle motor  
In a spindle motor for a driving a memory disk, a is closed space formed by a sleeve metal, an end portion of a shaft and a thrust plate. The closed space is connected to outside open space by a...
5769544 Dynamic pressure pneumatic bearing device and manufacturing method thereof  
A dynamic pressure pneumatic bearing device has a groove for generating a dynamic pressure and formed on an inner circumferential face of a rotating shaft or an outer circumferential face of a...
5746515 Dynamic-pressure gas bearing  
A dynamic-pressure gas bearing wherein a rotational shaft is disposed to surround an outer circumference of a stationary shaft or to be surrounded by an inner circumference of a stationary shaft,...
5715116 Spindle motor for driving memory disk  
In a spindle motor for a driving a memory disk, a closed space is formed by a sleeve, an end portion of a shaft and a thrust plate. The closed space is connected to outside open space by a...
5713670 Self pressurizing journal bearing assembly  
A self pressurizing journal bearing assembly includes a tubular housing having a bore defining a plain cylindrical journal bearing, and a cylindrical rotary shaft disposed coaxially therein. The...
5700092 Integrated shaft self-compensating hydrostatic bearing  
An integrated spindle shaft and the like and self-compensating hydrostatic bearing assembly, obviating the need for external bearing sleeve constructions, in which a cylindrical bearing bore is so...
5667308 Bearing device for use in a motor  
A dynamic pressure bearing device for use in a motor including a shaft and a frame. Two bearings interconnect the shaft and the frame of the motor. The two bearings contain a noncompressible fluid....
5606448 Polygon scanner and production process thereof  
A polygon scanner has a lighter rotating shaft on which a polygon mirror is mounted, to prevent a positional deviation of the polygon mirror from the rotating shaft in high speed rotation, in which...
5567056 Turbocharger drive and planet bearing therefor  
A planet bearing and gear assembly for the carrier of a speed increasing planetary gear train for driving a diesel engine turbocharger or the like includes an enlarged diameter gear bore and...
5556207 Hydrostatic/hydrodynamic flywheel bearing for a press  
A hydrostatic/hydrodynamic flywheel for a press including a flywheel mounted for rotation about a non-rotating quill. A bronze bushing is disposed between the quill and flywheel. Hydrostatic pad...
5533813 Dynamic air pressure bearing  
Disclosed is the improvement in a dynamic air pressure bearing in which a rotor is supported at high speed in the non-contact state. In an optical deflector, a stationary shaft is planted at the...
5448121 Pneumatic and magnetic bearing type motor  
A pneumatic and magnetic bearing type motor provides a hollow rotary member fitted rotatably on a stationary shaft, radial pneumatic bearings having dynamic pressure generating grooves formed on...
5430590 Spindle system for a disk drive  
A spindle system is comprised or a journal and thrust air bearing. The journal bearing; has two sets of opposing groove areas. The thrust air bearing has two sets of spiral grooves. The thrust air...
5427456 Fluid bearing with asymmetrical groove pattern  
An electric motor construction includes a rotor housing and sleeve which surrounds a shaft/thrust plate. The thrust plate is enclosed in a dead end cavity and is surrounded by a fluid which forms a...
Matches 1 - 50 out of 98 1 2 >